Arbor for coil winding apparatus



Sept. 20, 1960 R. o. BIRCHLER ETAL 2,953,311

ARBOR FOR COIL WINDING APPARATUS Original Filed April 9, 1951 2 Sheets-Sheet 1 4. mg .m i www 4 fr il?? 8 3 /oM United States This invention relates to a composite arbor for a coil winding apparatus, and is a division of co-pending application Serial No. 219,948, tiled April '9, 1951, now Patent No. 2,815,905, entitled Apparatus for Winding Coils on Spools.

In winding a plurality of coils on cylindrical cores, such as sheets of dielectric, which may also be interleaved between successive layers of the windings, various ways have been devised for holding the strands of wire during the beginning and the end of the Iwinding operation so as to expedite the winding of the coils. However, in the winding of coils on spools having heads on the ends thereof, difficulty has been experienced in simultaneously and expeditiously winding a plurality of such coils because of the problem of securing the ends of the strands of wire to the arbor and winding the initial convolutions of strands onto the spools.

It is an object of the invention to provide an improved arbor for supporting a plurality of spools in a coil winding machine and for holding the ends of strands being wound thereon.

A device illustrating certain features of the invention may include an arbor for supporting a plurality of spools and spacing collars in abutting relation to each other in a coil winding machine, the collars having tapered end surfaces which cooperate with the spool heads to form wire gripping grooves therebetween for receiving and holding end portions of Wires to be wound onto the spools.

Other objects and advantages of the invention will become apparent by reference to the following detailed description thereof and the accompanying drawings illustrating -a preferred embodiment of the invention, in which Fig. 1 is a fragmentary front elevational View of a winding machine with an arbor embodying the present invention;

Fig. 2 is a vertical sectional view of a portion of the machine taken on line 2 2 of Fig. 1 showing the arbor in full lines in operative position on the winding spindle and showing in dotted lines an -arbor on which the coils have been completely wound supported in a holder in spaced relation to the winding spindle;

Fig. 3 is a view similar to Fig. 2 showing an arbor having a set of completely Wound coils thereon in the holder and an arbor with a set of unwound spools thereon inoperative position on the spindle land showing the strands being moved by a comb into gripping engagement with the arbor;

Fig. 4 is a :fragmentary View ofthe comb;

Fig. 5 is an enlarged longitudinal elevational sectional view of one embodiment of the composite arbor in assembled relation;

Fig. 6 is an elevational sectional view of another embodiment of the composite arbor;

Fig. 7 is an end view of -a spool supporting and spacing collar shown in Fig. 5; and

Figs. l8 and 9 `are side elevational Iand sectional views, respectively, of the'spool on which a coil is to be wound.

The present coil winding machine 14 is designed to Wind strands of wire on spools 115 (Figs. 8 and 9) each of which comprises a cylindrical wall 116 anda pair of am o "ice

spaced parallel heads 117 and 118 extending laterally outwardly therefrom to form an annular channel in which the strand 120 is wound to form the coil. The head 117 is provided with a notch 122 through which the strand passes during the initial portion of the winding operation. On completion of the winding of the coil, the strand is passed into an angular slot 123 also formed in the head 117 to retain the strand and prevent the unwinding of the coil. The ends 124 and 125 of the strand extending through the slots 122 and 123, respectively, form leads for the coil wound on the spool.

A plurality of the spools 115 are adapted to be mounted in coaxial and spaced relation to each other on a com- .posite arbor 130 (Figs. 1 and 5) which comprises an arbor shaft or shank 131 and a plurality of annular spool supporting and spacing elements or collars 133. Each of the spacing collars 133 has an annular rabbet providing -a cylindrical surface 134 engageable with the wall 116 of the spool 115 for supporting the spool in coaxial relation to the arbor, and an annular abutting surface 135 engageable with the head 117 of the spool. The surface 135 is tapered or convexly curved adjacent the periphery -thereof and cooperates with the head of the spool to vform an annular substantially V-shaped strand gripping groove 1'36 for receiving and frictionally holding a wire 120 pressed thereinto.

The axial length of the cylindrical shoulder formed bygripped between the surfaces 135 and 138 on the spacing collars 133.

If desired, the end surface 138 of the spacing collars may have tapered or sloping marginal portions cooperable'v with the ends of the spools to form strand gripping grooves on the other side of the spools 133 from the grooves 136.

With the spacing collars 133 and spools 115 `assembled on the arbor shank 1131 as shown in Fig. 5 the endmost collar 133 abuts a head or shoulder 155 on one end o'f the arbor shank, and the spools 115 and spacing collars 133 Vare retained on the arbor in tight engagement with eachother and the head 155 by a locking collar 160 which has 'a pin 161 engageable in a bayonet slot 162 in the arbor shank. A spring 163 surrounding the arbor shank 131 and located in a groove in the head 155 aids in maintaining the spacing collars 133 and the spools 115 in engagement with each other.

Each of the spacing collars has an axially extending groove or line 164 on its periphery and a radially disposed aligning pin 165 in a predetermined angular relation to each other so that the spools 115 may be assembled on the collars 133 with the notches 122 in registration with the grooves 164, and the collars 133 assembled on the arbor shank with the aligning pins 165 tting in a keyway 166 to locate the notches 122 of the spools in aligng ment with each other and in a predetermined angular position on the arbor.

A flattened non-circular end 167 of the arbor projects beyond the head 155 and is receivable in a conforming socket in the end of a head stock spindle 68 of the winding machine 14. The opposite end 168 of the arbor is` tapered and is receivable in a tapered socket in a tail stock 74.

The tail stock is rotatable in a support mounted on a base 76 of the winding machine and is movable axially into and out of engagement with the arbor. The head stock spindle 68 is mounted for rotation in a support 78 mounted on the base 76 and is rotated by a suitable drive means (not shown). A' distributor 814 mounted for reciprocation in a frame is provided for distributing the wires in the spools 115 during the coil winding operation.

In the operation of winding the coils the spools 115 are assembled on the spacing collars 133 with the notches 122 of the spools 115 in alignment with the grooves 164 thereof. The spacing collars 133 with the spools 115 thereon are then assembled on the arbor shank 131 and locked in position by the collar 160. The assembled arbor with the empty spools 115 thereon is then applied to the spindle 68 and locked in position with the tail stock 74, after which the free ends 124 of the wires 120 are moved laterally into the wire gripping grooves 136 to secure the ends of the wires to the arbor. At the beginning of the winding operation the notches 122 in the spools 115 are positioned a relatively small angular distance to the rear of the wires 120 as seen in Fig. 2, and the wires 120 are urged to the right as viewed in Fig. l by the distributor 84 so that upon rotation of the arbor the wires 12) will ride on the periphery of the spool heads 117 and into the notches 122 thereof and onto the walls 116 of the spools.

After predetermined lengths of the wires have been wound on the spools the winding spindle 68 is stopped in the same predetermined angular position shown in Fig. y2, after which the tail stock 74 is retracted and the arbor with the wound coils thereon is removed from the spindle 68 by the operator who then turns the arbor to position the slots 123 of the spools 115 into close proximity with the wires 120 and then imparts a lateral movement or twist to the arbor to cause the wires 120 to enter the slots 123 to prevent the uncoiling of the wires from the spools. The arbor with the wound coils thereon is then deposited in slotted arms 95 on the base 76 and is supported thereby in fixed and spaced relation to the axis of the winding spindle 68. A portion of the wires 120 extend from the wound spools on the arbor to the distributor as shown in Fig. 2. Another composite arbor with empty spools thereon is inserted in operative position in the machine in driving engagement with the winding spindle 68 and supported by the tail stock spindle 73.

A comb member 9S having a serrated edge 99 forming V-shaped grooves spaced apart distances equal to the spacing of the wires 120 and spools 115 is provided to move the wires 120 into engagement with the wire gripping grooves 136 of the arbor on the winding spindle and Vto sever the portions of the wire extending between the two arbors and leave the ends of the wires from the supply reels gripped in the grooves 136 of the arbor on the winding spindle. The arbor with the fully wound coils thereon is then removed from the holder 95, after which the locking collar 16@ is removed from the arbor to permit the spacing collars 133 and the spools 115 with the coils thereon to be slid off 'of the arbor shank and separated from one another.

In the construction shown in Fig. 6 the shank 2131 of the arbor is engageable with the cylindrical walls 116 of the spools for slidably receiving and supporting the spools 115 thereon. A plurality of annular spacing collars 233 of substantially rectangular cross section are adapted to be assembled on the shank 231 of the arbor on opposite sides of the spools 115 to space the spools axially in predetermined positions on the arbor. The spools 115 and spacing collars 233 are held on the shank 231 against a head 255 on one end of the shank by a collar 261i having a pin engageable with a bayonet groove in the arbor shank 231. A spring 2643 disposed in a recess in the head 255 urges the spacing collars and spools against the locking collar 261) to maintain them in tight engagement with each other.

One or both of the end faces of the spacing collars 233 may be tapered slightly so that when the elements are assembled on the shank 231 of the arbor against the heads of the spools, they form in cooperation with the spool heads, narrow V-shaped grooves 236 for receiving and gripping the strands forced thereinto. Pins 257 extending inwardly from the spacing collars 233 are engageable in a keyway 258 in the shank 231 to 'align the spacing collars 233 in a predetermined angular relationship so that the spools may be angularly positioned on the shank of the arbor with the wire receiving notches 122 formed in the heads 117 thereof in alignment with grooves or other aligning marks 264 on the periphery of the collars 2133 to align the notches in the spools in a predetermined angular position on the arbor.

It is to be understood that the above-described arrangements are simply illustrative of the application of the principles of this invention. Numerous other arrangements may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof.

What is claimed is:

l. In a coil winding device, an arbor for removably supporting a headed spool, a member on the arbor independent of the spool and having a portion engageable with a head on the spool and an annular portion sloping from the head and cooperating therewith to form an annular groove with diverging strand-*gripping surfaces for receiving and gripping a strand, and means on the arbor for holding the spool and the member in engagement with each other.

2. A coil winding device which comprises Van arbor for removably supporting a headed spool, a collar independent of said spool positioned on the arbor and having `a tapered end portion engageable with a head of the spool and cooperating therewith to form an annular groove of V-shaped cross section, and means on the arbor for pressing the spool and the collar toward one another, said tapered end portion of the collar permitting a strand to be wedged between it and the spool.

3. A coil winding device comprising an arbor for supporting a plurality of spools thereon, spacing elements independent of said spools removably supported on said arbor member for positioning the spools -in a predetermined relation to each other, each of said spacing elements having an end `surface cooperating with an end of a spool to form an annular groove having diverging strand-engaging surfaces Vfor gripping a strand v'moved laterally into engagement therewith, and means for holding the spools and elements in engagement with one another -on said member.

4. A coil winding device which comprises a plurality of spools on which strands are to be wound, an arbor for supporting the spools thereon, collars on the arbor independent of said spools for positioning the spools ina predetermined spaced relation to each other and having sloping end surfaces cooperating with the ends of the spools to form annular grooves having diverging strandengaging surfaces for receiving and frictionally 'holding strands moved laterally into engagement therewith, and means for retaining the spools and the collars inengagement with each other on the arbor.

5. An arbor assemblage which comprises a plurality of headed spools on which strands are to be wound, members independent of said spools engageable with the heads of said spools for axially spacing the spools, means for removably supporting a plurality of the spacing members and the spools in alternate and assembled relation for rotation about an axis concentric with the spools, and annular wedging surfaces on the ends of said members sloping from the heads of the adjacent spools for wedging the strands against the spool heads.

References Cited in the le of this patent UNITED STATES PATENTS v805,265 Cowles et al "Nov. 2l, 1905 2,432,270 Asbill Dec. 9, 1947 2,678,012 Ayres May -1l, 1954 2,763,444 Burlein Sept. 18, T1956 FOREIGN PATENTS 225,247 VGermany Sept. Y5, 1910 526,886 `France -Iuly 1-1, l1921 

